|Class 12 Maths Determinants||Cofactors|
Cofactors (Minors with Signs)
Cofactor of an element aij , denoted by Aij is defined by Aij = (–1)i+j Mij , where Mij is minor of aij.
Determinant = a11 A11 + a12 A12 + a13 A13
If elements of a row (or column) are multiplied with cofactors of any other row (or column), then their sum is zero